Yarn guiding device for making cops haivng frusto-conical ends



G. GUIBERT 2,830,774 YARN GUIDING DEVICE FOR MAKING COPS HAVING April 15, 1958 FRUSTO-CONICAL ENDS 3 Sheets-Sheet 1 Filed April 2, 1956 INVENTUR GEORGES GUIBERT Eir W4 ATTUHNEY5 G. GUIBERT 7 2,830,774 YARN GUIDING DEVICE FOR MAKING COPS HAVING April 15,1958

FRUSTO-CONICAL ENDS 3 Sheets-Sheet 2 Filed April 2, 1956 April 15, 1958 G. GUIBERT 2,830,774

G YARN GUIDING DEVICE FOR MAKING COPS HAVING FRUSTO-CONICAL ENDS Filed April 2, 1956 s sheets sheet 3 {NYENTDR GEORGES GUIBERT IATTUHNEYJ ited States Patent fine 2,830,774 -Paten'ted Apr. 15, 1958 YARN GUIDING DEVICE FOR MAKING COPS HAVING FRUSTO-CONHCAL ENDS Georges Guibert, Pent-Salomon, France, assignor to Societe Condamin et Proalon, Saint-Chamend, France, a society of France Application April 2, 1956, Serial No. 575,438

Claims priority, application France April 5, 1955 3 Claims. (Cl. 242-43) The present invention relates to yarn guiding devices for making cops withfrusto-conical ends, in particular for use with yarn throwing machines.

Such machines include a rod extending transversely to the axis of the cop and one end of which carries a guide eye for the yarn constantly applied on the cop.

According to my invention, said rod is carried at its other end by a support having a rectilinear reciprocating movement along a path parallel to said axis and said rod is given, about an axis perpendicular both to said first mentioned axis and to said rod, an oscillation movement with respect to said support in phase with said rectilinear reciprocating movement, said oscillation movement being controlled in accordance with the variation of the radial distance from said guide-eye to the cop axis so as to make the amplitude of said oscillation movement the smaller as said radial distance is greater.

Other features of my invention will become apparent in the course of the following detailed description of some embodiments thereof, with reference to the accompanying drawings given merely by way of example and in which:

Fig. 1 is an elevational view of a yarn guiding device according to the invention, the parts being shown in the position they occupy at the beginning of a cop winding operation.

Fig. 2 is a similar view showing the parts at the end of the cop winding operation.

Fig. 3 is a plan view corresponding to Figs. 1 and 2, the solid lines corresponding to Fig. 1 and the dotted lines to Fig. 2. i

Fig. 4 is a vertical sectional view on the line IV-lV of Fig. 1.

Figs. 5 and 6 are respectively an elevational view partly in section and a plan view respectively of a yarn guiding device made according to another embodiment of my invention.

A bar 1 is given, through means shown on Fig. 4, a rectilinear reciprocating motion alon its own axis, which is parallel to the axis of the cop 16 journalled in frame F.

- The amplitude L of this reciprocating motion (Figs. 3 and 6) is constant. The yarn guiding device includes a plate 2 rigid with bar 1. A support 4 is pivoted to plate 2 about an axis 3. This support 4 carries, rigid therewith, an arm 5 of cylindrical shape. In the enlarged portion of arm 5 adjacent to support 4, a spindle 6 is journalled about an axis intersecting the axis of arm 5.

The upper end of spindle 6 carries a rod '7 rigid therewith and the end of which carries a guide-eye 8 for the yarn 9.

On arm 5 is pivotally mounted a lever 10 the upper end of which forms a cage for a ball 11 through which rod 7 is slidably guided. The lower end of lever 10 is constantly applied against the upper edge 2a of plate 2 under the action of a compression spring 12 mounted on arm 5 (Figs. 1, 2 and 3). V

A link 13, hinged without play to the lower end of lever 10, is slidable freely through a ball 14 which is freely oscillable in a socket 15 fixed with respect to the frame. This socket 15 has its center located at equal distances from the respective ends of the cop.

The hinge connection of link 13 with lever 10 and the guiding of said link in ball 14 enable said lever 10 to slide freely on arm 5 when said arm pivots, together with support 4, about axis 3 in order to occupy a position such as illustrated by Fig. 2.

On the other hand, when this arm 5 is driven with a reciprocating motion by bar 1, lever 10 oscillates about arm 5 as shown by Fig. 4. But parts 5, 10 and 13 always remain in a common plane.

The means for imparting a reciprocating sliding movement tobar 1 are shown on Fig. 4. A cam shaft C, journalled in the frame of the machine and driven by pinions P P carries a helical cam C in the groove of which is slidably engaged a roller i carried by a sleeve I fixed to bar 1.

The operation of the device is as follows: The guide-eye 8 guides the yarn 9 on a cop 16 and remains constantly applied against said cop under the effect both of the tension of the yarn and of the action of spring 12, since this spring, bearing against lever 36 applied against plate 2, tends to opposea rotation toward the left of support 4 and of all the parts (in particular rod 7) carried by said support.

As the yarn is being wound on cop 16, that is to say as the radius of said cop is increasing, eye 3 moves so that its vertical projection describes a circular are having its center on axis 3, support 4 being accordin ly pivoted about the same axis as shown by Fig. 2.

When the angle made by support 4 with its initial post tion increases, lever 1i which is constantly applied against the edge 2a of plate 2 is caused to slide along arm 5, thus compressing spring 12 and moving away from spindle 6. Ball 11 follows the displacement of lever 10 by which it is carried and slides along rod 7.

Bar 1 transmits to support 4 its reciprocating rectilinear movement the amplitude of which is equal to L. Spindle 6 and arm 5 therefore have reciprocating movements of the same amplitude L, but the supplementary oscillation of lever 10 about the axis of arm 5 due to the action of link 13 and swivel joint 14 causes ball 11 to have a displacement the amplitude of which is longer by 2l than the amplitude of displacement of spindle 6. This length 2! is substantially constant during the whole winding operation.

The rod 7 is therefore given a movement which is the resultant of the'displacement of the spindle 6 about which it is pivoted and of the complementary oscillating displacements of ball 11. Guide-eye 8 therefore has a movement of an amplitude equal to L+2l multiplied by the ratio of the distance between guide-eye 8 and spindle 6 to the distance between the center of ball 11 and said spindle'6.

This ratio is maximum at the beginning of the yarn winding operation, as shown by Fig. 1. At this time, the amplitude of the displacement of guide-eye 8 is maximum and equal to L (Fig. 3).

As the radius of the cop increases, the distance from the center of ball Ill. to spindle 6 increases, to reach its maximum when the maximum diameter of the cop has been obtained. As a consequence, the amplitude of the reciprocating movement of guide-eye 8 constantly decreases as the radius of the cop is increasing, and it finally reaches its minimum value L (Fig. 3) when the radius of the cop is maximum.

This operation permits of obtaining the two frusto- "conical ends of the cop, said ends being equal or different according as the center of ball 14 is or is not located in the plane dividing length L into equal portions.

It should be noted that, in the embodiment which has just been described, spring 12 is more and more compressed as the diameter of the cop is increasing, which simultaneously increases the pressure with which guideeye 8 is applied against said cop.

The presence of this spring therefore limits the maximum diameter of a cop to be obtained with such a device.

I will now describe another embodiment of my invention in which this drawback is eliminated and it is therefore possible to obtain cops of very large diameters.

In this construction, illustrated by Figs. 5 and 6, the spindle 6 on which rod 7 is oscillable is slidable in two guiding bearings provided respectively in arm 5 and in spindle 3. A rigid rod is provided so as constantly to connect said spindle 6 with plate 2 and thus to determine the axial position thereof in its bearings in accordance with the radius of the cop.

Advantageously, such a rod 18 is constituted in the form of a stirrup of suitable length the ends of which are engaged in corresponding recesses provided at O in plate 2 and the middle portion of which extends through a ring 18a rigid with the top portion of spindle 6. The dimension of this ring in a direction parallel to its axis is suiticiently small to enable spindle 6 to have rotations of small amplitude as required for the operation of the device.

In this construction, there is no spring such as 12 and lever 10, while still pivotable about arm 5, is not slidable along said arm, being held between two fixed shoulders 19 of arm 5.

Lever 10 is in the form of a hollow tube the upper portion of which is provided with longitudinal slots and forms an open cage for ball 11 through which rod 7 is freely slidable.

Link 13, hinged without play to the lower end of lever N, is in this case a rod the axis of articulation 17 of which with lever 10 is located in a plane perpendicular to that containing substantially arm 5, lever 10 and rod 13. Thus, these three last mentioned elements can move relatively to one another but they are always located substantially in a common plane. Rod 13 can slide freely in ball 14 through which it passes.

The operation of this device is as follows:

Guide-eye 8 distributes the yarn of the cop 16 against which it is constantly applied by the tension of yarn 9 and the weight of the movable portion of the apparatus.

When the radius of the cop increases, it causes the portions of the device which is pivoted about axis 3 to come into a position such as indicated in dash-and-dot lines on Fig. 5.

This movement has two efiects:

(a) The portion of arm 5 which carries lever 10 is moved away from fixed point 14, which reduces the amplitude of the oscillations of lever 10 about the axis of arm 5;

(b) Spindle 6 is caused to slide in its guide bearings, and in particular to move down with respect to arm 5 since the stirrup 18 keeps a constant distance between the top of spindle 6 and fixed points of plate 2, which compels ball 11 to move down in its cage constituted by the upper portion of piece 10, this ball being thus brought to a shorter distance from the axis of arm 5.

Therefore, since ball 11 is constantly getting nearer to the axis of oscillation of its guide 10 and since the oscillations of said guide are constantly being reduced as the radius of the cop increases, the oscillation movements In a general manner, while I have, in the above description, disclosed what I deem to be practical and efiicient embodiments of my invention, it should be well understood that I do not wish to be limited thereto as there might be changes made in the arrangement, disposition and form of the parts without departing from the principle of the present invention as comprehended within the scope of the accompanying claims.

What I claim is:

l. A yarn guiding device for making cops having frustoconical ends which comprises, in combination, a frame, a cop journalled in said frame about a given axis, a support mounted in said frame to be both slidable along a second axis parallel to said first mentioned axis and pivotable about said axis, means for imparting a reciprocating motion to said support along said second axis, a lever pivotally mounted on said support about a third axis, fixed with respect to said support and at right angles to said second mentioned axis, the upper end of said lever forming a cylindrical socket, a ball movably fitted in said socket, said ball being provided with a diametral hole, a rod pivoted at one end to said support about a fourth axis transverse to said first and third mentioned axes and to said rod, said rod fitting slidably in said diametral hole to extend transversely to said first mentioned axis, a yarn guiding-eye at the other end of said rod in contact with said cop, whereby said support is gradually pivoted about said second mentioned axis as the radius of the cop is increasing, a part-spherical socket carried in fixed position by said frame and having its center located between the ends of said cop, a ball in said last mentioned socket provided with a diametral hole, a link slidably guided in said last mentioned diametral hole, hinge means connecting the upper end of said link with the lower end of said lever, said hinge means being arranged to keep said link, said lever and said third axis in a common plane, whereby said rod is given a movement of oscillation about said third mentioned axis in phase with said reciprocating motion, and means responsive to variation of the radius of said cop for reducing the amplitude of said last mentioned movement when said radius increases.

2. A yarn guiding device for making cops having frustoconical ends which comprises, in combination, a frame, a cop journalled in said frame about a given axis, a bar parallel to said axis having a reciprocating movement in said frame in its own direction, a plate fixed to said bar, a support pivoted to said plate about a second axis parallel to said first mentioned axis, a lever pivotally mounted on said support about a third axis, fixed with respect to said support and at right angles to said second mentioned axis, the upper end of said lever forming a cylindrical socket, a ball movably fited in said socket, said ball being provided with a diametral hole, a rod pivoted at one end to said support about a fourth axis perpendicular to said first and third mentioned axes and to said rod, said rod fitting slidably in said diametral hole to extend transversely to said first mentioned axis, a yarn guiding-eye at the other end of said rod in contact with said cop, whereby said support is gradually pivoted about said second mentioned axis as the radius of the cop is increasing, a part-spherical socket carried in fixed position by said frame having its center located between the ends of said cop, a ball in said last mentioned socket provided with a diametral hole, a link slidably guided in said last mentioned diametral hole, hinge means connecting the upper end of said link with the lower end of said lever, said hinge means being arranged to keep said link, said lever and said third axis in a common plane, whereby said rod is given a movement of oscillation about said third mentioned axis in phase with said reciprocating motion, said lever being slidable with respect to said support in the direction of said third axis, and spring means between said support and said lever for urging said lever against the upper edge of said plate.

3. A yarn guiding device for making cops having frustoconical ends which comprises, in combination, a frame, a cop journalled in said frame about a given axis, a bar parallel to said axis having a reciprocating movement in said frame in its own direction, a plate fixed to said bar, a support pivoted to said plate about a second axis parallel to said first mentioned axis, a lever pivotally mounted on said support about a third axis, fixed with respect to said support and at right angles to said second mentioned axis, the upper end of said lever forming a cylindrical socket, a ball movably fitted in said socket, said ball being provided with a diametral hole, a spindle both pivotable and slidable in said support respectively about and along a fourth axis transverse to said first and third mentioned axes and to said rod, 8. rod fixed to the upper end of said spindle, said rod fitting slidably in said diametral hole to extend transversely to said first mentioned axis, a yarn guiding-eye at the other end of said rod in contact with said cop, whereby said support is gradually pivoted about said second mentioned axis as the radius of the cop is increasing, a part-spherical socket carried by said frame having its center located between the ends of said cop, a ball in said last mentioned socket provided with a diametral hole, a link slidably guided in said last mentioned diametral hole, hinge means connecting the upper end of said link with the lower end of said lever, said hinge means being arranged to keep said link, said lever and said third axis in a common plane whereby said rod is given a movement of oscillation about said third mentioned axis in phase with said reciprocating motion, said lever being held with respect to said support in fixed position in the direction of said third axis, and a member pivoted at one end to said spindle and at the other end to said plate, about respective axes parallel to the first mentioned axis.

References Cited in the file of this patent UNITED STATES PATENTS 1,236,464 Marcroft Aug. 4, 1917 

